Pentair System 3 Tank Bottom Kit, 21", Modular/DE | 24850-0102S Salt Systems serial number

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low-effort pool closure

with a sturdy barrier that stays in place when the pool is not in use

Choosing Waterway Plastics helps ensure supply chain stability and compatibility with existing Waterway components in professional builds

Pentair pool maintenance products are widely used by service professionals

Pentair System 3 Tank Bottom Kit, 21", Modular/DE | 24850-0102S Salt Systems serial numberWhat This Part Is Used For Pentair 24850 0102S Bottom Tank Kit is a replacement lower tank section for 21in System III Mod DE filter assemblies. It forms the base housing that supports the internal filter components. Why This Part Matters A cracked or leaking lower tank can cause pressure loss and water leakage around the equipment pad. Replacing the bottom tank restores structural integrity and proper filtration performance. This is critical after